package com.bw.controller;

import com.alibaba.fastjson.JSON;
import com.bw.entity.User;
import com.bw.mapper.UserMapper;
import org.spring.kun.common.Md5Utils;
import org.spring.kun.common.TokenUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.RequestMapping;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.validation.Valid;
import java.util.concurrent.TimeUnit;

@Controller
public class LoginController {

    @Autowired
    UserMapper userMapper;

    @Autowired
    RedisTemplate redisTemplate;
    @RequestMapping("/loginPage.do")
    public String loginPage() {

        return "login";
    }

    @RequestMapping("/login.do")
    public String login(@Valid User loginUser,BindingResult result,HttpServletRequest request,HttpServletResponse response,Model model) {
        if (result.hasErrors()){

            model.addAttribute("error",result.getAllErrors().get(0).getDefaultMessage());

            return "login";
        }

        User userFromDB = userMapper.selectByPhone(loginUser.getPhone());

        if (userFromDB == null){
            model.addAttribute("error","用户名不存在");

            return "login";
        }
        String loginUserPassword = loginUser.getPassword();

        String salt = userFromDB.getSalt();
        String dbPassword = userFromDB.getPassword();

        String md5String = Md5Utils.getMD5String(loginUserPassword + salt);

        if (!md5String.equals(dbPassword)){
            model.addAttribute("error","密码错误");

            return "login";
        }
        // 加密用户信息 得到token  把token放入cookie  把cookie返回给浏览器

        TokenUtils.responseTokenByCookie(userFromDB,response);

        //使用Redis保存登录的用户信息，设置过期时间为cookie的过期时间
        redisTemplate.opsForValue().set("currentUser", JSON.toJSONString(userFromDB),30, TimeUnit.MINUTES);
        return "redirect:list.do";
    }

}
